Radio vanity case



RADIO VANITY CASE Filed Sept. 8, 1925 4 Sheets-Sheet l Sept., 1, 1931. l H, P PRATT 1,821,923@

RADIO VANITY CASE Filed Sept. 8, 1925 4 Sheets-Sheet 2 Sept. 1, 1931. H. P. PRATT RADIO VANITY CASE Filed sept. s, 1925 4 Sheets-Sheet 3 37 9.9 Je 131 7f3? 130 j i) jmmf Sept. 1, 1931. H. P. PRATT a '1,821,236

RADIO VANITY CASE Filed Sept. 8', 1925 4 Sheets-Sheet 4 gg /fjf /Jf U -//MZ fly/5%:

ea ,//J www-f -ff/f2 iatenteol Sept. l, 1931 unirse 4stares PAT ENT omc;

HARRY FRESTGN PRTT, G35' CHC-AGG., lLilS,y ASSIGNOR, BY MESNE ASSIGNMENTS,

T9 IARRY PRESTQN FEAE', XVILL HGVJ'ARD TEGIEPSON BALLARD, F PRATT 'BLADIG TRUST Application iled September This invention relates to a. radio vanity case which will serveA the double purpose of providing a container having ay portable radio set therein and also the usualvanity rase equipment. 1

The object oi2 the invention is the provision of a compact portable radio set so constructed amL arranged 'that it may be readily placed in one section of a vanity case and still have room in another section of the case for the usual vanity caseequipment.A

@ne of the features of the invention is the provision of a case, such as the ordinary vanity case, divided by a false bottom into two similar coi-npartments, one oi which contains a complete radi-o set, including the'antenna, the other being equipped withthe usual vanity case articles.

Ano her feature is the provision o1c ahigh t oltage battery ci' small size and light Weight in an equipment such as above described.

Another feature isi-the provision of al selt` contained adjustable antenna loop. i

Other features and advantages will Yappear from time to time as the description of the invention progresses.

It is believed the various features of the invention will be understoodV most Areadily from a det-ai ed description thereof taken in connection with the accompanying drawings v lich form part of the present applica.- tion and in which- Y Figure 1 is a view of the case showing one ot the doors or covers open and disclosing the radio equipment nested in one compartment.

Figure 2 is a cross section through the entire case and shows the false bottom with the ranity equipment on onefside thereof in one compartment and the radio equipment in the other compartment.

Figure 3 is a viewrof the side of the case coinaining the vanity equipment.

Figure i is a section on the line 4 4 of Figure 2 and shows the rcelfor winding up the antenna. Y

Figure 5 shows diagrammaticaiiy a circuit which may be employed with the radio equipment of Figure 1.

Figure 6 shows a modification of the cir- RADIO VlIT CASE S, 1925. `Serial No. 54,916.

cuit of Figure 5 in whichthe antenna and ground wires are connectedto thetwo con'- tacts respectively, of plug such as is `used in connection with the ordinary plug socket employed in connectiony with elect-ric light circuits. y Y i i Figure 'Tis aview, similar to Figure 1 of a modified form ofradio equipment employe ing tubes and a source of electric current and Figure S is a diagram of a. circ-uit su'ch as may be employed with the equipment of Figure 7.:

Figure 9 is a view showing the manner of mounting the tuning loop antenna in the cover. Y.

Figure 10 shows 'the adaptation of the device of Figure?v to a loudspeaker hornv y Figure 11 isa side View of a-plugsocket showin-gthe spring vcon-tact therein to engage the plug and,r

Figure 12 is a `view of the plug socket at right angles to Figure 11. f

Referring nowto the drawings in vwhich like reference characters indicate the same parts in the several-views, 1.0 is avanity or like case formed of papierumch or other suitable' material having galpartition or false bottom ldividing the 'case into two similar compartments 12 and 113,: one of which is adapted to receive the usual equipment of a vanity case and the'other to receive a radio set. Mounted within the compartment :113, Aad.-` jacent to one end thereofand in any desired manner,l is the tuning coil 214. AOn opposite sides ofthe coil 14 and-parallel thereto are the bars 15 and 16 on-which areslidably mounted the Contact carriers17 and 18, respectively, adapted to bek moved along `the bars by means of the buttons' or knobs 19 and '20.. lCarried by the carriers 17 and 18 are the substantially semi-circular Contact carrying arms 21 and 22. vThe arms 21 and 22 are slidably connectedto theV carriers'l and 18 and are so constructed .that the contacts 23 and 24 at the ends thereof are always resiliently maintained in contact with the coil 14. Thebuttons 25. and 26 at the free ends of the arms' 21 and 22 provide means whereby the arms may readily 'be moved in relation to the carriers 17 and 18. The carriers make electrical contact at all times with the bars and 16. The numr ber of turns of the coil 14 between the contacts 23 and 24 is regula-ted by moving the carriers 17 and 18 toward or Jfrom each other and a finer adjustment may be obtained by moving the arms 21 and 22 in relation to the carriers to move the respective contacts 23 and 24 along the wire of the selected turn of coil 14. As this inanner of adjustment is readily understood from the foregoing, it will not be further described. c

Mounted at one side of the compartment 13 is a crystal holder or cup 30 within which is secured the crystal 31 by means of the screw 32.

Fixed to therpartition 11 are the spaced concave members .33 and 34 between which is held the ball 35, Extending through the ball 35 is the rod or pin 36, having at one end thereof the handle 37 and at the other end the resiliently held crystal engaging contact 38.

Fixed to the partition 11, adjacent Vto the bar 16, is the rectangular frame 40. Frame 40 has in one side thereof the plug socket contacts 41 and 42 adapted to receive the plug contacts 43 and 44 respectively at the ends of the antenna and ground wires. The forward side of frame 40 is lprovided with the plug` socket contacts 45 and 46 adapted to receive the plugs 47 and 48 respectively at the ends of the conductors 49 and 50 which lead to the ear phone 51 arranged within the frame 40.

In the opposite ends of the case are the reels 54 and 55 on which are wound the antenna 56 and the ground wire 57 when not in use. These reels may be provided with rewind springs suchr as indicated kat 58and automatic catch and release devices such as are well known in connection with shade rollers` and the like. A contact ring and brush (not shown) are provided tov extend the antenna 56 to the plug 43. A like arrangement is provided in connection'with the ground wire 57.

lVhen in use the plugs 43 and 44 will be inserted in the sockets 41 and 42 as previously explained. The antenna 56 will be unwound from the reel 54 and suspended in any desired manner and the ground wire 57 is unwound and connected to a radiator, gas fixture or any other convenient ground.

At 60 is shown the cover, supported by the hinges 61 and arranged to be held in closed position by the coacting catch members 62 and 63. If desired, the back of the ear phone 51 may be formed of highly polished metal so to form a small hand mirror. The usual handle is shown at 64.

Referring now to Figure 3, it will be noted that the compartment 12 containing the vanity equipment is similar to compartment 13.

Within compartment 12 is a comb 71 secured by loop 72 attached to partition 11 and a purse 72 held by a similar loop 74. A compact container 74, lip stick tube 75 and rouge container 76 are also secured by the loops 77, 78 and 79 respectively. The hinged cover 80 is provided with the mirror 81 (see Figure 2) and the catch members 82 and 83 for holding cover 80 in closed position.

Referring now to Figure 5, it will be seen that the contact bar 16 is joined to the crystal cup 30 by means of the conductor 85 and that ball 35 is joined to the plug socket 46 by means of the conductor 86, socket .42 is joined to socket 45 by conductor 87 and one end of the coil 14 is connected to socket 42 by conductor 88.* Contact bar 15 is joined to socket 41 by conductor 89. Assuming the set is connected as herein shown, the oscillations received by antenna 56 will pass through plug 43, socket 41, conductor 89, contact bar 15, carrier 17 and contact carried thereby, coil 14, contact and carrier 18, contact bar 16, conductor 85, crystal cup 30, contact 38, ball 35, conductor 86, socket 46, plug 48, conductor 50, ear phone 51, conductor 49, plug 47, socket 45, conductor 87, socket 42, plug 44 and conductor 57 to ground.

It desired the conductors 56 and 57 may be joined to the contacts 91 and 92 et an electric light socket plug 93 as indicated in Figure 6.

Figure 7 shows a tube and battery in the place of the crystal set of Figure l.

At the right is a battery of 48 cells of the silver chloride variety which give a voltage of from 48 to 50 volts. These cells are indicated by the reference character 95. At the left is another battery oi 4 larger cells indicated at 96.

At 97 is shown a variable condenser 97 and 98, 99 indicate two separate transitoriner coils. Within the square frame 100 is ear phone 101, provided with the conductors 102, 103 tern'iinating in the plugs 104 and 105 respectively. The plugs 104 and 105 are adapted to be received by the plugsockets 106 and 107 within the side ci' the frame 100. Adjacent to the frame 100 are four tubes 108 and alsotubes 1.09 and 1.10.

Figure 9 shows the tuning loop antenna arranged within the cover of the box. '.lhis antenna may be substantially like that shown in applicants prior filed application Ser. No. 46692. t consists of the frame 111 joined to the cover by means oie the hinge 1152, a frame 113 pivotally joined to frame 111 by means of the pivots 114 and a iframe 115 pivotally joined to frame 113 by means of pivots 116. Thus frame 111 may be moved into substantially vertical position ico due to the hinge connection 112. Then frame 113 may be rotated on pivots 114 to adjust frame 113 in relation to frame 111 and frame 115 may be adjusted about pivots 116V to vary the relation of frame 115 to frame 113. l

found about the frames 111, 113 and 115 are the coils 117, 118 and 119 respectively indicated in Figure 3. These coils may be arranged in series as indicated in Figure 3 or in many other ways, including those disclosed in applicants prior led application above mentioned.

It has been found that when a structure employing a plurality of coils of wire, such as disclosed herein, is rotated, it acts to change the frequency of the circuitV and thus stations may be tuned inand tuned out by rotating the coil structure as a unit without rotating the coils in relation to each other. ln the present case, this may be accomplished by merely turning the case around.

For instance, if the coils of a structure such as shown in Figure 9 are moved to a vertical position and the case is slowly revolved, the sending stations of the surround ing territory will be brought in one after another and then tuned out. Assuming now a station has been brought in by rotating the case as just explained, it is quite likely that other stations will also be audible. If now the Vseveral coils are adjusted in relation to each other, a point of adjustment will be found where all except the desired stations will be tuned out. By themeans described in applicants prior application, the antenna herein disclosed may be used in connection with an aerial but. it will give very satisfactory results as to volume and quality when no aerial is employed.

It will be noted that when the coils are rotated they not only change their inductive relation to each other, but also change the relation of the plane of the coils to the point from which the electrical oscillations emanate. It is thought that this feature Vof changing the relation of the plane of the coil to the direction from which the oscilla-A tions originate has a material effect on the All this is more fullyl tuning operation. discussed in applicants prior application. *y

Referring now to Figure 8, it will be seen that one terminal of the battery consisting of cells 95 is joined to one terminal of `the receiver or earphone 101 by conductor 120 Aand the other terminal of the Vbattery is connected to the primary 121 of the transformer 99 by conductor 122. The mid-point of the battery of cells 95 is joined by conductor 123 to the primary 124 of transformer 98.

The antenna coils 117 118 and 119'may be arranged in series, as shown, coil 119 being connected by conductor 126in parallel y to one terminal of each of the filaments 127 J horn tothe equipment.

of tubes 103 and also to filament 123oftube 109 and to filament 129 of tube110.y Y

The opposite end of coil 121 is joined in parallel byconductor 125 tothe plates 130 oftubes 108. 'Oneend of coil 117 of the antenna is joined byconductor 131 to the grids 132 of tubes 108.` Variable condenser 97 is included in the bridge 133 between conductors 126 and 131. The tubes108 are connected in parallel in the circuit to deefficiency of the circuit. f 1 Plate 133 of tube 110v is joined, by conductor 134 to the receiver 101 and plate 135 of tube 109 is oined to the primary 124-byV the conductor 136. Grid 137 is joined by conductor 138 to conductor 139, secondary coil 140-being included in the connection. Con ductor 139 is joinedto one terminal of each of theilaments of tubes 108, tube 109 and tube .nol

Grid 141V oftube 110 is joined by conductor 142 to conductor 139, secondary 143 and battery 96a. being included in the connection. Battery 96a may consist of the two cells indicated at 96a in Figure 7. Filament 129 is joined to conductor 139 and also to conductor 126, battery 96 being included in the connection to conductor 126. o In Figure 10 is shown the application of the cover will be provided with the opening 150 which will overlie the center of receiver 101. This will permit the sound to issue fromthe case even when the cover is closed.

Figure 11 shows the construction of the plug sockets such as 45. vThe tube 160 forming thesocket will have a strip 161 `punched i in combination with a ladies vanity case.

This malingit possible to tune in at almost anytime or place. The fact that the antenna is self contained Aand located in the cover and also' acts as a tuning device makes the arrangement very effective.

Notwithstanding that the equipment is complete in every respect, it is very compact and light and will not be burdensome to'carry as a vanity case.V i

Many modifications may be made in the structure herein disclosed. For instance a separateV tuning arrangement, as a poten tiometer, may be provided for each tube. Many other modifications may be made without departing from the spirit of the invention.

Having thus described my invention, what I claim as new and desire to obtain by Letters Patent of the United States is:

1. An article of manufacture comprising To accomplish this,

crease the resistance and to increase the a case, a radio set in said case, a hinged cover for said casefsaid radio Set including an antenna positioned WithinV Said cover and adapted to be swung therefrom, said antenna comprising a plurality of coils each rotatable in relation to the other when swung,` from the Cover.

2. An article of manufacture Comprising a oase, a complete radio 4set in said case, a @over for said 025e, Said radio set including' an antenna positioned Within said cover and adapted to he swung therefrom, said antenna comprieing a plurality of coils of Wire arranged iii-substantially the saine plane, each of said coils being rotatably adjustable in relation to the other ooiiswhen swung 'from the cover.

In 'testimony whereof I have signed'this spe-oilication.l A

- HARRY PRESTON PRATT. 

